Broadband Observations of the Transient X-ray Pulsar SAX J2103.5+4545

Details Broadband Observations of the Transient X-ray Pulsar SAX J2103.5+4545 Broadband Observations of the Transient X-ray Pulsar SAX J2103.5+4545

2004-10-25

arxiv.org/abs/astro-ph/0410590v1

Astron.Lett. 30 (2004) 824-833; Pisma Astron.Zh. 30 (2004) 905914

Astronomy and Astrophysics

Astrophysics

17 pages, 7 figures, Astronomy Letters, 30, 824-833 (2004)

Scientific paper

10.1134/1.1833433

We investigated the optical, X-ray, and gamma-ray variability of the pulsar SAX J2103.5+4545. Our timing and spectral analyses of the X-ray and gamma-ray emissions from the source using RXTE and INTEGRAL data show that the shape of its spectrum in the energy range 3 -- 100 keV is virtually independent of its intensity and the orbital phase. Based on XMM-Newton data, we accurately (5 arcsec) localized the object and determined the optical counterpart in the binary. We placed upper limits on the variability of the latter in the R band and the H-alpha line on time scales of the orbital and pulse periods, respectively.

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